7138729081

Names of 7138729081

• Cardinal: 7138729081 can be written as Seven billion, one hundred thirty-eight million, seven hundred twenty-nine thousand and eighty-one.

Scientific notation

• Scientific notation: 7.138729081 × 10⁹

Factors of 7138729081

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 4
• Sum of prime factors: 7692

Divisors of 7138729081

• Number of divisors d(n): 9
• Complete list of divisors:
  1 11 121 7681 84491 929401 58997761 648975371 7138729081
• Sum of all divisors σ(n): 7847723919
• Sum of proper divisors (its aliquot sum) s(n): 708994838
• 7138729081 is a deficient number, because the sum of its proper divisors (708994838) is less than itself. Its deficiency is 6429734243

Bases of 7138729081

• Binary: 110101001100000000101110001111001₂
• Hexadecimal: 0x1A9805C79
• Base-36: 3A27QM1

Squares and roots of 7138729081

• 7138729081 squared (7138729081²) is 50961452891915104561
• 7138729081 cubed (7138729081³) is 363800005769525906712766438441
• 7138729081 is a perfect square number. Its square root is 84491
• The cube root of 7138729081 is 1925.4857114497

Scales and comparisons

• 7,138,729,081 seconds is equal to 226 years, 51 weeks, 3 days, 4 hours, 18 minutes, 1 second.
• To count from 1 to 7,138,729,081 would take you about four hundred fifty-three years!

  This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)

• A cube with a volume of 7138729081 cubic inches would be around 160.5 feet tall.

Recreational maths with 7138729081

• 7138729081 backwards is 1809278317
• The number of decimal digits it has is: 10
• The sum of 7138729081's digits is 46
• More coming soon!